Grate for sintering apparatus



Mar. 3. 1925. I 1,528,322

'r J. DAVIS GRATE FOR SINTERING APPARATUS F iled Feb. 2, 1921 3 Sheets-Sheet 1 Mar. 3. 1925. 1,528,322

T. J. DAVIS GRATE FOR SINTERING APPARATUS Filed Feb. 2, 1921 3 Sheets-$heet 2 6 FIE-5.2: 3

s 'M 5 a 1 a a? Mar. 3. 1925.

T. J. DAVIS GRATE FOR SINTERING APPARATUS Filed Feb. 2, 1921 3 Sheets-Sheet 5 v l/V VE/VTOE 77154 W 5. MM M Patented Mar. 3, 1925.

UNITED STATES 1,528,322 PATENT OFFICE.

THOMAS J. DAVIS, or nuounsnn, PENNSYLVANIA, ASSIGNOR T0 JOHN E. amma- WALT, on NEW YORK, N. Y.

GRATE FOR SINTERING APPARATU-w Application filed February 2, 1921. Serial No. 441,829.

To all whom it'mag concern:

Be it known that I, THOMAS J. DAVIS, a citizen of the United States. and resident of Duquesne, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Grates for Sintering Apparatus, of which the following is a specification.

This invention relates to-grates, and while not limited thereto, is particularly adapted to grates for use in sintering pans or other such apparatus, used in sintering blast furnace flue dust, iron ores, and other finely divided materials.-

In sintering flue dust, iron ores, etc., the grates of the sintering apparatus become clogged more or less with clinker. cinder, etc. After the pan has been tilted to discharge the sintered mass, it has been necessary to spend considerable time and labor to clean out the grates and to remove dust and particles of sinter lodged beneath the grates.

One of the principal objects of this invention is to provide a grate, having swinging grate bars adapted to automatically dislodge any clinker or other substances clogging the grate, when the pan is tilted, to discharge the sintered mass.

Another object of the invention is to provide a grate having fixed and swinging bars, said swinging bars being adapted to move out of alinement with the fixed bars, when the grate is tilted from a horizontal position, and to automatically return into alinement when the grate is returned to a horizontal position.

These and other objects and advantages will .be more clearly brought out in the following specification and claims, and illustrated in the accompanying drawings, in which:

Figure 1 is a top plan of a sintering pan partly broken away, and having some of the grates in position.

Figure 2 is a longitudinal sectional side elevation on the line IIII of Figure 1.

Figure 3 is a cross sectional elevation on the line III-III of Figure 1.

Figure 4 is a cross section through the sintering pan, showing it in tilted or discharging position, and showing the swinging ate bars swung out of alinement with the xed bars.

Figure' 5 is a cross section through one of the grate sections.

Figure 6 is a plan of one of the grate sectlons.

In the accompanying drawings, the numeral 2 designates a sintering pan which is arranged to tilt or rock about a horizontal axis, opposite ends of this.pan being provided'with hollow trunnions 3, 3, by which the pan is rotatably mounted in suitable bearings.

The pan 2 integrally formed ends 7 the hollow trunnions 3, 3, opening into the pan through the end walls of the pan. At an intermediate point in the height of the side walls of the pan is a series of grate sections 8, constructed in accordance with this invention. The grate sections 8 are supported vertically by transverse girder supports 9.

The outer ends of the hollow trunnions 3, 3 are connected to one end of suitable conduits 10, which are adapted to have their other end connected to an exhausting device (not shown) for creating a suction, thereby drawing the gaseous products of combustion through the grate sections 8, and along the pan beneath the grate.

The girders 9 have apertures 12 in their has a bottom 5, sides 6, 6, and a web portion to provide for a suction or draft along the entire length of the sintering pan. The grate sections 8 are of rectangular shape. and are arranged in a number of series, longitudinally of the pan. The end grate section of each series is secured to the ends of the pan in any suitable manner and the intermediate sections are each interlocked with each other and with the girder supports 9, as at 14.

Each grate section 8 comprisesa rectangu- I lar frame portion 15, having a plurality of fixed grate bars 16 formed integrally therewith and spaced apart a distance greater than their width. Other bars 17 of the same cross section as the bars 16, are mounted'in bars will swingoutwardly by gravity. The bars 16 and 17 are provided with suitable spacing bosses or shoulders 19 around the The bars 16 and 17 are substantially diamond shaped is cross section, being beveled or tapered suddenly from a point above their longitudinal axis toward the center of their top face, and being tapered gradually from the bottom edge of the upper bevel, downwardly toward the center of their bottom face.

The end walls of the frame portion 15 of the grate sections are beveled along their upper edges as at 20, and tapered downwardly from the lower edge of the bevel as at 21. The end of the pivoted grate bars (nearest the pivot bar 18) is cut away as at 22 to allow such end to swing clear of the end of the frame 15. while the other end is formed with a projection 23 overlapping the beveled portion 20 of the adjacent end of the frame 15, and adapted to contact therewith when the grate bars are in horizontal position, thereby supporting the bars 17 in alinement with the bars 16.

Suitable centering lugs 23 are provided on each side of the pivoted bars 17. These lugs 23 are adapted to strike the beveled upper faces of the adjacent fixed bars 16 as the pivoted bars swing down into alinement with the fixed barsathus serving to guide or center the bars as they are seated.

The grate bars 16 and 17 being of the same cross section and held in spaced relation by the spacing bosses 19. it will be apparent that equi-distant spaces are formed between each of the bars 16 and 17 to provide for a draft through the grate sections, while the sintering operation is going on.

It will, of course. be understood that this invention is not limited to grates for sintering pans, nor to a grate composed of sections. since it is adapted to other uses, and may be made as an integral grate or in sections, as desired, since each section is in reality a grate complete in itself.

If desired, the pivoted bars 17 may be provided with an elongated aperture for the reception of the pivot bar 18. so that when the grate is tilted the pivoted bars will have a slight longitudinal movement. thus serving to better loosen the sintered material.

The operation of the grate will be readily understood. As said grate is tilted or turned beyond the vertical, the pivoted grate bars 17 will swing about the pivot bar 18, due to ofi center mounting of said grate bars on the pivot 18. The swinging of the grate bars 17 will dislodge any clinker or other matter lodged in the openings between the bars, and will also rovide openings of sufficient width to allow the escape of any matter collected in the pan 2, below the grates.

7 I claim 1. A grate comprising a plurality of sections, each of said sections having alternating fixed and pivoted bars, all of said bar-s being in alinement when said grate is in a horizontal position, and said pivoted bars being free to swing out of alinement with said fixed bars, when said grate is tilted.

2. A grate comprising a plurality of interlocked sections, each of said sections having alternating fixed and pivoted bars, all of said bars being in alinement when said grate is in a horizontal position, and said pivoted bars being free to swing out of alinement with said fixed bars when said grate is tilted.

3. In combination with a sintering pan mounted for tilting about a horizontal axis a grate mounted within said pan and spaced from the bottom thereof, said grate comprising a plurality of sections, each of said sections having a frame portion, a plural ity of fixed parallel bars formed integral with said frame portion, other bars pivotally mounted between said fixed bars, said pivoted bars being in alinement with said fixed bars when said pan is in a horizontal position and being free to swing out of alinement with said fixed bars when said pan is tilted beyond the vertical.

4. In combination with a sintering pan mounted for tilting about a horizontal axis,

a grate mounted within said pan. said grate comprising a plurality of substantially mounted. sections supported on suitable transverse apertured girders within said pan. said sections being interlocked with each other and with said girders, each of said sections comprising a frame portion. a pluralitv of fixed parallel bars formed'integral with said frame portion. other bars pivotally mounted between said fixed bars, said pivoted bars being in alinement with said fixed bars when said Dan is in a horizontal position and being free to swing out of alinement with said fixed bars. when said pan is tilted beyond the vertical.

5. A grate having-aplurality of parallel bars. some of said bars being rigid and other of said bars being pivoted so as to be rotatable about their horizontal axis. said pivoted bars being free to swing endwise out of alinement with said rigid bars when said grate is tilted.

6. A grate section comprising a frame portion. a plurality of fixed parallel bars formed integral with said frame portion. other bars pivotally mounted between said fixed bars so as to be rotatable about their horizontal axis. said last named bars being free to swing endwise out of alinement with said fixed bars when said grate section is tilted.

7. A grate having alternating fixed and pivoted bars, all of said bars being held in alinement when said grate is in a horizontal position, and said pivoted bars being mounted for pivotal movement about their horizontal axis and being free to swing endwise out of alinen'ient with said fixed bars I when said grate is tilted.

8. A grate'sectioncomprising a frameportion, a plurality of alternating fixed and pivoted bars'within said frame portion, said pivoted; bars being rotatable about their horizontal axis and being supported on said frame portion in alin-ement with said fixed, bars when said grate section is in a horizontal position, and said pivoted bars being free to swing, endwise out of alinement with said fixed bars. when said grate section, is tilted beyond the vertical.

9., A grate comprising a plurality of sec tions, eachof said sections having alternating fixed and pivoted bars, said pivoted bars being rotatable about their horizontalaxis and being free to swin endwise. out of alinement with said fixe bars when said endwise out of alinementwith said fixed bars when said grate is tilted, and all of said bars being in alinement "when said grate is in a horizontal position.

11. In ooinbinationwith a sinteringpan adapted to be tilted about a horizontal axis,

a grate having alternately fixed and pivoted bars, all of said bars'being held in alinement when said pan is in a horizontal osition, said pivoted bars beng rotata le about their horizontal-axis and being free to swing endwise out of alinement with said fixed bars when said pan is tilted.

In testimony whereof, I have hereunto set my hand. a

V THOMAS J. DAVIS. 

